Dearomative Pyrrole (3 + 2) Reaction with Geminal Bromonitroalkane: Synthesis of 2,3-Dihydropyrroles

Dearomative 1,3-dipolar cycloadditions of 1-Boc-pyrroles with in situ generated silver α-bromo alkylidenenitronates delivered a series of 3 a ,6 a -dihydro-4-Boc-pyrrolo[2,3- d ]isoxazole-2-oxides (17–91% yields) under very mild conditions.